explain:1/2/1/2means the LED color of the four circuits are alternative. 1/1/1/1 means the LED color of the four circuits are the same. 1/1/2/2 means the left LED color of the two circuits are the same, the same goes for the right, but each side is different. Red, amber/white, blue, green is optional, such as red/white, red/blue, amber/green, amber/white.